[svn-r761] Changes since 19981013

----------------------

./src/H5.c
	Fixed a signed vs. unsigned comparison.

./src/H5D.c
	Setting a fill value of all zeros will cause the fill value to
	be written to the dataset instead of relying on the low-level
	file driver initializing unwritten areas with zero.

./src/H5D.c
./src/H5F.c
./src/H5Fprivate.h
./src/H5G.c
./src/H5Gpkg.h
./src/H5Gprivate.h
./src/H5O.c
./src/H5T.c
	More file mounting stuff.

./src/H5I.c
	Fixed a bug where trying to close an invalid object id caused
	a core dump.  For instance, H5Gclose(-1).

./MANIFEST
./test/Makefile.in
./test/mount.c		[NEW]
	Mounting tests.

./src/H5R.c
	Fixed a couple (herr_t)NULL casts.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/H5T.c b/src/H5T.c
index 0231a0e..cb72c8c 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -3679,6 +3679,7 @@ herr_t
 H5T_commit (H5G_entry_t *loc, const char *name, H5T_t *type)
 {
     herr_t	ret_value = FAIL;
+    H5F_t	*file = NULL;
     
     FUNC_ENTER (H5T_commit, FAIL);
 
@@ -3699,11 +3700,17 @@ H5T_commit (H5G_entry_t *loc, const char *name, H5T_t *type)
 		       "data type is immutable");
     }
 
+    /* Find the insertion file */
+    if (NULL==(file=H5G_insertion_file(loc, name))) {
+	HRETURN_ERROR(H5E_SYM, H5E_CANTINIT, FAIL,
+		      "unable to find insertion point");
+    }
+
     /*
      * Create the object header and open it for write access. Insert the data
      * type message and then give the object header a name.
      */
-    if (H5O_create (loc->file, 64, &(type->ent))<0) {
+    if (H5O_create (file, 64, &(type->ent))<0) {
 	HGOTO_ERROR (H5E_DATATYPE, H5E_CANTINIT, FAIL,
 		     "unable to create data type object header");
     }